London skyline seen from the Sky Garden on the top of the Walkie Talkie building in the City of London. Visitors and plants are seen small with the expanse of wide architecture. 20 Fenchurch Street is a commercial skyscraper in London that takes its name from its address on Fenchurch Street, in the historic City of London financial district. It has been nicknamed The Walkie-Talkie because of its distinctive shape. Construction was completed in spring 2014, and the top-floor 'sky garden' was opened in January 2015. The 34-storey building is 160 m (525 ft) tall, making it the fifth-tallest building in the City of London. Designed by architect Rafael Viñoly and costing over £200 million.